Yes, I used to use straight 40W and even 50W in my first MGB. That was well
over twenty five years or so ago when I was a bit skeptic of the new modern
multi-viscosity oils. I don't see any problem if the climate is in the
tropics where the high and low seldom vary by more than 10-20 degrees F
during the day. Back when I used the 40W oil, multi-viscosity was a newer
innovation and straight weight oils were common. I'd be hard pressed to
find any straight weight oils around here (Montana) anymore and that even
applies to gear oil where 90W has been replaced with "75w/90w".
I should mention too that I was a chemist who ended up doing oil testing
and in the process, I overcame my skepticism of multi-viscosity oil.
David Councill
67 BGT
72 B
At 08:24 PM 11/6/2003 -0800, Martin C. Galan wrote:
>Hi,
>
>
>I am writing about oil preference and use. Most references and MG manuals
>say that SAE 20W/ 50W is the required type of engine oil for the MGB. I
>live in the tropics and it never gets really "cold". From independent
>reading (thanks to this list) and personal experience with my 5 series
>BMW, straight 40W oil suits my driving needs.
>
>I was wondering if anyone has any personal experience using 40W oil in an
>MGB?
>
>Thanks,
>
>Martin
>
>65' B - engine back from the machine shop
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